it's an assignment of OOP.
week4.exe pdadd date(Y M D: like 2018/04/28 or 2018.04.28 whatever it is, just keep it consistent)
(1) week4.exe pdlist (2) week4.exe pdlist date_begin date_end
week4.exe pdshow date
week4.exe pdremove date
it's an assignment of OOP.
week4.exe pdadd date(Y M D: like 2018/04/28 or 2018.04.28 whatever it is, just keep it consistent)
(1) week4.exe pdlist (2) week4.exe pdlist date_begin date_end
week4.exe pdshow date
week4.exe pdremove date